General Description
The MAX11646/MAX11647 low-power, 10-bit, 1-/2-channel analog-to-digital converters (ADCs) feature internal track/hold (T/H), voltage reference, a clock, and an I2C-compatible 2-wire serial interface. These devices operate from a single supply of 2.7V to 3.6V (MAX11647) or 4.5V to 5.5V (MAX11646) and require only 6µA at a 1ksps sample rate. AutoShutdown™ powers down the devices between conversions, reducing supply current to less than 1µA at lower throughput rates. The MAX11646/MAX11647 each measure two single-ended or one differential input. The fully differential analog inputs are software configurable for unipolar or bipolar and single-ended or differential operation.

Features
♦ Ultra-Tiny 1.9mm x 2.2mm Wafer Level Package
♦ High-Speed I2C-Compatible Serial Interface
    400kHz Fast Mode
    1.7MHz High-Speed Mode
♦ Single Supply
    2.7V to 3.6V (MAX11647)
    4.5V to 5.5V (MAX11646)
♦ Internal Reference
    2.048V (MAX11647)
    4.096V (MAX11646)
♦ External Reference: 1V to VDD
♦ Internal Clock
♦ 2-Channel Single-Ended or 1-Channel Fully Differential
♦ Internal FIFO with Channel-Scan Mode
♦ Low Power
    670µA at 94.4ksps
    230µA at 40ksps
    60µA at 10ksps
    6µA at 1ksps
    0.5µA in Power-Down Mode
♦ Software-Configurable Unipolar/Bipolar

Applications
    Handheld Portable Applications
    Medical Instruments
    Battery-Powered Test Equipment
    Power-Supply Monitoring
    Solar-Powered Remote Systems
    Received-Signal-Strength Indicators
    System Supervision